ASTM A335 P22 ERW Low Alloy Steel Welded Pipe 1/8" to 48" Sch20S Sch30 for High Temperature Applications
| Product Name | ASTM A335 P22 ASME B36.10M/B36.19M ERW Low Alloy Steel Welded Pipe |
|---|---|
| Standards | ASTM A335/A335M, ASME SA335 |
| Size Range | 1/8" to 48" |
| Wall Thickness | Sch5S, Sch10S, Sch10, Sch20S, Sch30, Sch40S, STD, Sch40, Sch60, Sch80S, XS, Sch80, Sch100, Sch120, Sch140, Sch160, XXS |
| Length | SRL, DRL, or as customer's requirement |
| End Process | Plain Ends, Beveled Ends, Threaded Ends |
| Grade | C | Mn | P | S | Si | Cr | Mo | Others |
|---|---|---|---|---|---|---|---|---|
| P22 | 0.05~0.15 | 0.30~0.60 | ≤0.025 | ≤0.025 | ≤0.5 | 1.9~2.6 | 0.87~1.13 | Ni (≤0.4), Al (≤0.02), Cb (0.06~0.1), Ti (≤0.01), Zr (≤0.01) |
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| P22 | ≥415 | ≥205 | ≥30 |
In ERW welding, two electrodes, usually made from copper, are used to apply pressure and current. The electrodes are disc-shaped and rotate as the material passes between them. This allows the electrodes to constantly contact the material to make long continuous welds.
A welding transformer supplies low voltage, high current AC power. The joint of the pipe has high electrical resistance relative to the rest of the circuit and is heated to its melting point by the current. The semi-molten surfaces are pressed together with a force that creates a fusion bond, resulting in a uniformly welded structure.
Comprehensive dimensional data available for sizes from 1/8" to 48" across multiple schedule specifications including Sch5S, Sch10S, Sch20S, Sch30, Sch40S, and others.
Detailed specifications for stainless steel pipe dimensions including Sch5S, Sch10S, Sch40S, and Sch80S.
| NPS | t/D | Tolerance, % from Nominal |
|---|---|---|
| 1/8"~2.5" | All | +20.0 | -12.5 |
| 3"~18" | ≤5% | +22.5 | -12.5 |
| 3"~18" | >5% | +15.0 | -12.5 |
| ≥20" | All | +17.5 | -12.5 |
| ≥20" | ≤5% | +22.5 | -12.5 |
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